Supposedly, 0 degrees F is the approximate freezing point for a mixture of a 50% saltwater solution it's supposed to approximate the freezing point for blood (as I heard it), with 100 degrees approximating human body temperature. *shrug* it kinda makes sense

Celcius has always made the most sense to me. Likewise I use the metric system, though I do know the imperical system too.

I always get slightly peeved when British peopel don't know their hieight in metres or their weight in kg. I don't care if this country uses the imperical system for those things, you need do know the other systems.

And driving on the left has always annoyed me. Sweden switched in the 60s, why can't the UK? Sure it causes confusion for a day or two, but that's part of the fun
Stockholm on the day of the swicth